package com.isunland.managesystem.utils;

@SuppressWarnings("all") public class GPSToGCJUtil {

  static double pi = 3.14159265358979324;

  static double a = 6378245.0;

  static double ee = 0.00669342162296594323;

  /**
   * 设备经纬度转火星坐标
   * World Geodetic System ==> Mars Geodetic System
   *
   * @param wgLon 经度
   * @param wgLat 维度
   */
  public static double[] transform(double wgLon, double wgLat) {

    double[] d = new double[2];

    double mgLat;
    double mgLon;

    if (outOfChina(wgLat, wgLon)) {

      mgLat = wgLat;

      mgLon = wgLon;
    }

    double dLat = transformLat(wgLon - 105.0, wgLat - 35.0);

    double dLon = transformLon(wgLon - 105.0, wgLat - 35.0);

    double radLat = wgLat / 180.0 * pi;

    double magic = Math.sin(radLat);

    magic = 1 - ee * magic * magic;

    double sqrtMagic = Math.sqrt(magic);

    dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);

    dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);

    mgLat = wgLat + dLat;

    mgLon = wgLon + dLon;

    d[0] = mgLon;

    d[1] = mgLat;

    return d;
  }

  static boolean outOfChina(double lat, double lon) {

    if (lon < 72.004 || lon > 137.8347)

    {
      return true;
    }

    if (lat < 0.8293 || lat > 55.8271)

    {
      return true;
    }

    return false;
  }

  static double transformLat(double x, double y) {

    double ret =
        -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));

    ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;

    ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;

    ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;

    return ret;
  }

  static double transformLon(double x, double y) {

    double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));

    ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;

    ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;

    ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;

    return ret;
  }

  public static void main(String[] args) {

    double l = 113.68444;

    double a = 34.78545;

    double lng = transform(l, a)[0];

    double lat = transform(l, a)[1];

    System.out.println(lng);

    System.out.println(lat);
  }
}